I am over 50 and just diagnosed with ADD, anxiety, and low vitamin B12. I also get a feeling of something in my throat. My thyroid levels are fine. Is ADD a true chemical imbalance in the brain?
According to Dr. Amen who has done over 100,000 SPECT brain imaging exams, there are 7 types of ADD. Please review his information at this link: http://www.amenclinics.com/conditions/adhd-add/